In a wireless communication system including a plurality of client stations including at least one client station that is not configured to utilize carrier aggregation, different coverage areas correspond to different frequency bands being utilized. The trailer hitch cover assembly also includes a main body adapted to be disposed over the hitch tube and adapted to allow insertion of a hitch into the hitch tube. One embodiment of the device includes a stack of plates connected by a connecting rod in a manner that allows the plates to adopt a helical configuration about the connecting rod when the plates are rotated about the longitudinal axis of the rod. The anchor coat layer is placed next to the substrate. An uppermost portion of the first engagement surface defines a first push surface that is generally at the same height as a second push surface defined by an uppermost portion of the second engagement surface.